A quantity is said to be subject to exponential decay if it decreases at a rate proportional to its value. If the decaying quantity, N(t), is the number of
Smeed’s Law, named after R. J. Smeed, who first proposed the relationship in 1949, is an empirical rule relating traffic fatalities to traffic
Population growth rate
In biology or human geography, population growth is the increase in the number of individuals in a population.
The “population growth
Arithmetic mean is the sum of a collection of numbers divided by the number of numbers in the collection. The collection is often a set of results of an
The variance is a parameter that describes, in part, either the actual probability distribution of an observed population of numbers, or the theoretical